If x is an integer, is 9^x + 9^{-x} = b ? I. 3^x + 3^{-x}= \sqrt{b + 2} II. x > 0

TS ICET 2016 Question Paper with Solutions for online practice

Question : 18 of 200

Marks: +1, -0

If x is an integer, is

9^x + 9^{-x}

= b ?
I.

3^x + 3^{-x}= √{b + 2}

II. x > 0

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